Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Monday, 30 June 2025

‹ 29.06.2025 2025 01.07.2025 ›

Photosphere sunspot drawing and RDS evaluation

30.06.2025 photosphere drawing

High-resolution scan (3228 px)

Time
11:45 UT
Observer
Süleyman FİŞEK
g
13
f
53
R
183
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HS_ – 1Group 1 · HS_ – 1 Group 2 · AX_ – 1Group 2 · AX_ – 1 Group 3 · DSI – 14Group 3 · DSI – 14 Group 4 · HS_ – 2Group 4 · HS_ – 2 Group 5 · DSC – 13Group 5 · DSC – 13 Group 6 · AX_ – 1Group 6 · AX_ – 1 Group 7 · DSC – 6Group 7 · DSC – 6 Group 8 · HS_ – 1Group 8 · HS_ – 1 Group 9 · DSI – 6Group 9 · DSI – 6 Group 10 · CSI – 4Group 10 · CSI – 4 Group 11 · AX_ – 1Group 11 · AX_ – 1 Group 12 · HS_ – 2Group 12 · HS_ – 2 Group 13 · AX_ – 1Group 13 · AX_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=30.06.2025
Saat=11:45
Gözlemci=Süleyman FİŞEK
KontrolEden=
Durumaçısı=-2.83
Enlemaçısı=2.81
Boylamaçısı=214.7
Boylamfark=0
GKalite=3
GDurum=G.T , H.S
Kuzeyaçısı=-0.5
Sırano=20286
AyRasatNo=29
RasatÖnceki=29.06.2025
RasatSonraki=1.07.2025

[Leke Grupları]
Grupsayısı=13:5:8
LekeSayısı=53:31:22
RölatifSayı=183:81:102
01=HS_ 01 +17.833 +84.575 299.275 -1.000 0000 0 +18.369 +86.588 +17.298 +82.561
02=AX_ 01 +14.815 +48.541 263.241 -1.000 0000 0 +14.815 +48.541 +14.815 +48.541
03=DSI 14 +13.393 +01.779 216.479 +0.000 0000 0 +16.840 +06.597 +10.702 -03.400 +13.393 +06.397 +13.393 -02.840
04=HS_ 02 +21.374 -41.154 173.546 -1.000 0000 0 +22.508 -40.100 +20.240 -42.298
05=DSC 13 +02.446 -45.917 168.783 +0.000 0000 0 +04.150 -42.545 +00.878 -49.289 +02.446 -42.745 +02.446 -49.890
06=AX_ 01 -13.455 +61.915 276.615 -1.000 0000 0 -13.455 +61.915 -13.455 +61.915
07=DSC 06 -27.616 +15.857 230.557 +0.000 0000 0 -26.285 +18.830 -28.948 +12.884 -27.616 +18.630 -27.616 +13.840
08=HS_ 01 -13.999 -17.304 197.396 -1.000 0000 0 -13.667 -16.889 -14.331 -17.718
09=DSI 06 -17.556 -27.582 187.118 +0.000 0000 0 -16.515 -25.165 -18.597 -29.999 -17.556 -25.365 -17.556 -29.799
10=CSI 04 -04.578 -34.307 180.393 +0.000 0000 0 -03.773 -31.340 -05.383 -37.580 -04.578 -31.234 -04.578 -37.380
11=AX_ 01 -08.150 -44.819 169.881 -1.000 0000 0 -08.150 -44.819 -08.150 -44.819
12=HS_ 02 -16.401 -77.396 137.304 -1.000 0000 0 -15.862 -75.498 -16.940 -79.494
13=AX_ 01 -11.767 -77.481 137.219 -1.000 0000 0 -11.767 -77.481 -11.767 -77.481
20250630.gzd

Chromosphere (H-α) FITS frames

H-α

The images are made automatically with a fixed, gentle rule: uneven illumination and most of the limb darkening are removed, and the brightness is shown on a linear scale (no sharpening); prominences get their own scale outside the limb. Frames are ordered by sharpness (seeing); frames without the Sun (darks, bias) come last. Method →

2025/20250630_sf · SF · 6 frames · 128.6 MB · 11:51:59–11:55:57 UT

11:55:57 UT · 3 ms 11:51:59 UT · 6 ms 11:54:57 UT · 3 ms 11:52:58 UT · 3 ms 11:54:27 UT · 6 ms 11:55:27 UT · 6 ms

Coronado H-α animations from frame sequences

No Coronado observation for this day.